Double
This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has three or four possible answer choices. Test questions come from the Maryland Commercial Driver Guide. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.
Number of Question
Passing Score
8. If a vehicle is accompanied by a vehicle inspection report:
Explanation
As the first step of a vehicle inspection, a driver should review any inspection report left by the previous driver.
9. What eliminates alcohol from the bloodstream?
Explanation
The body processes alcohol at a fixed rate that cannot be sped up through tricks like drinking coffee. The only way to sober up is to give the body the time it needs to remove the alcohol on its own.
10. During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
Explanation
When performing a static leakage test on a double combination vehicle with air brakes, the leakage rate should be no more than 3 psi in one minute. If the air leaks from the air brake system at a quicker rate, the vehicle should not be driven because something likely needs to be repaired.
11. During an inspection, the release arm should be properly seated and the safety latch or lock should be:
Explanation
When inspecting the fifth wheel before a trip, you should ensure that the release arm is properly seated and the safety latch or lock is engaged. All components should be present and in proper working condition.
12. What should you do when confronted with an aggressive driver?
Explanation
If confronted by an aggressive driver, the most important thing for you to do is get out of their way. Avoid making eye contact, do not challenge them by increasing your speed, and do not let yourself be provoked by any angry gestures they direct toward you.
13. If a truck is equipped, a trailer brake hand valve can be used to:
Explanation
If a tractor-trailer is so equipped, the trailer brake hand valve can be used to stop the vehicle from rolling back when being started from a stop.
14. A broken exhaust system can:
Explanation
Defects in an exhaust system are very dangerous because they can cause poisonous fumes to enter the cab or sleeper berth.
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Frequently Asked Questions
To obtain a CDL Doubles/Triples endorsement in Maryland, you must follow these steps:
1. Meet the eligibility requirements: You must have a valid Maryland CDL and be at least 21 years old.
2. Study the doubles/triples endorsement section of the Maryland CDL manual: You can download a copy of the manual from the Maryland MVA website or obtain a printed copy from a local MVA office.
3. Pass the doubles/triples knowledge test: Schedule an appointment at a Maryland MVA testing center and take the knowledge test. You will need to answer questions about driving doubles and triples, including weight distribution, coupling and uncoupling, and safety precautions.
4. Practice driving doubles/triples: If you have not already done so, spend time practicing driving with a commercial vehicle that has doubles/triples. Make sure you are comfortable with the additional length, weight, and handling considerations.
5. Pass a skills test: Schedule an appointment at a Maryland MVA testing center and take the skills test. This will involve driving a commercial vehicle with doubles/triples under the supervision of an examiner. You will need to demonstrate your ability to perform basic maneuvers, such as backing up, turning, and shifting gears.
6. Pay the required fee: Once you have passed both tests, you will need to pay the required fee to add the doubles/triples endorsement to your CDL.
Note that if you already hold a P (passenger) or S (school bus) endorsement on your CDL, you may be exempt from taking the skills test for the doubles/triples endorsement. However, you will still need to pass the knowledge test and pay the required fee.
1. Meet the eligibility requirements: You must have a valid Maryland CDL and be at least 21 years old.
2. Study the doubles/triples endorsement section of the Maryland CDL manual: You can download a copy of the manual from the Maryland MVA website or obtain a printed copy from a local MVA office.
3. Pass the doubles/triples knowledge test: Schedule an appointment at a Maryland MVA testing center and take the knowledge test. You will need to answer questions about driving doubles and triples, including weight distribution, coupling and uncoupling, and safety precautions.
4. Practice driving doubles/triples: If you have not already done so, spend time practicing driving with a commercial vehicle that has doubles/triples. Make sure you are comfortable with the additional length, weight, and handling considerations.
5. Pass a skills test: Schedule an appointment at a Maryland MVA testing center and take the skills test. This will involve driving a commercial vehicle with doubles/triples under the supervision of an examiner. You will need to demonstrate your ability to perform basic maneuvers, such as backing up, turning, and shifting gears.
6. Pay the required fee: Once you have passed both tests, you will need to pay the required fee to add the doubles/triples endorsement to your CDL.
Note that if you already hold a P (passenger) or S (school bus) endorsement on your CDL, you may be exempt from taking the skills test for the doubles/triples endorsement. However, you will still need to pass the knowledge test and pay the required fee.
To obtain a CDL Doubles/Triples license in Maryland, you must meet the following requirements:
1. Be at least 21 years old: You must be at least 21 years old to drive a commercial motor vehicle that has doubles/triples.
2. Hold a valid Maryland CDL: You must already have a valid Maryland commercial driver's license (CDL) or obtain one before you can add the doubles/triples endorsement.
3. Pass the doubles/triples knowledge test: You must pass a knowledge test that covers the safe operation of commercial motor vehicles with doubles/triples, including weight distribution, coupling and uncoupling, and safety precautions.
4. Pass a skills test: You must pass a skills test that demonstrates your ability to operate a commercial motor vehicle with doubles/triples safely and effectively.
5. Pay the required fee: You must pay the required fee to add the doubles/triples endorsement to your CDL.
In addition to these requirements, you may also need to meet other qualifications depending on the type of commercial motor vehicle you will be driving with doubles/triples. For example, if you will be driving hazardous materials with doubles/triples, you may need to pass additional tests or obtain additional endorsements.
1. Be at least 21 years old: You must be at least 21 years old to drive a commercial motor vehicle that has doubles/triples.
2. Hold a valid Maryland CDL: You must already have a valid Maryland commercial driver's license (CDL) or obtain one before you can add the doubles/triples endorsement.
3. Pass the doubles/triples knowledge test: You must pass a knowledge test that covers the safe operation of commercial motor vehicles with doubles/triples, including weight distribution, coupling and uncoupling, and safety precautions.
4. Pass a skills test: You must pass a skills test that demonstrates your ability to operate a commercial motor vehicle with doubles/triples safely and effectively.
5. Pay the required fee: You must pay the required fee to add the doubles/triples endorsement to your CDL.
In addition to these requirements, you may also need to meet other qualifications depending on the type of commercial motor vehicle you will be driving with doubles/triples. For example, if you will be driving hazardous materials with doubles/triples, you may need to pass additional tests or obtain additional endorsements.
Yes, you may need specific experience or training to obtain a CDL Doubles/Triples endorsement in Maryland. The Maryland Motor Vehicle Administration (MVA) requires that you have a certain amount of experience operating a commercial motor vehicle before you can add the doubles/triples endorsement to your CDL.
Specifically, you must have at least one year of experience driving a commercial motor vehicle with a Class A CDL before you can add the doubles/triples endorsement. This experience must be gained while operating a commercial motor vehicle that is similar in size and weight to the one you will be driving with doubles/triples.
In addition to the experience requirement, it is recommended that you receive specific training before operating a commercial motor vehicle with doubles/triples. This training should cover topics such as weight distribution, coupling and uncoupling procedures, and safe driving techniques. Some employers may also require additional training before allowing you to operate a commercial motor vehicle with doubles/triples.
Overall, it is important to make sure you have the necessary experience and training before adding the doubles/triples endorsement to your CDL in order to ensure your safety and the safety of others on the road.
Specifically, you must have at least one year of experience driving a commercial motor vehicle with a Class A CDL before you can add the doubles/triples endorsement. This experience must be gained while operating a commercial motor vehicle that is similar in size and weight to the one you will be driving with doubles/triples.
In addition to the experience requirement, it is recommended that you receive specific training before operating a commercial motor vehicle with doubles/triples. This training should cover topics such as weight distribution, coupling and uncoupling procedures, and safe driving techniques. Some employers may also require additional training before allowing you to operate a commercial motor vehicle with doubles/triples.
Overall, it is important to make sure you have the necessary experience and training before adding the doubles/triples endorsement to your CDL in order to ensure your safety and the safety of others on the road.
Yes, to obtain a CDL Doubles/Triples endorsement in Maryland, you must pass a written test that covers the safe operation of commercial motor vehicles with doubles/triples. This test is in addition to the standard CDL knowledge test that all commercial driver's license applicants must take.
The doubles/triples endorsement test covers topics such as weight distribution, coupling and uncoupling procedures, and safety precautions. You will need to demonstrate your knowledge of these topics in order to pass the test.
In addition to the written test, you will also need to pass a skills test that demonstrates your ability to operate a commercial motor vehicle with doubles/triples safely and effectively. This skills test will be conducted by a certified examiner and will involve performing maneuvers such as backing up, turning, and coupling and uncoupling the vehicle.
Overall, obtaining a CDL Doubles/Triples endorsement in Maryland requires passing both a written test and a skills test, as well as meeting other requirements such as having at least one year of experience operating a commercial motor vehicle with a Class A CDL.
The doubles/triples endorsement test covers topics such as weight distribution, coupling and uncoupling procedures, and safety precautions. You will need to demonstrate your knowledge of these topics in order to pass the test.
In addition to the written test, you will also need to pass a skills test that demonstrates your ability to operate a commercial motor vehicle with doubles/triples safely and effectively. This skills test will be conducted by a certified examiner and will involve performing maneuvers such as backing up, turning, and coupling and uncoupling the vehicle.
Overall, obtaining a CDL Doubles/Triples endorsement in Maryland requires passing both a written test and a skills test, as well as meeting other requirements such as having at least one year of experience operating a commercial motor vehicle with a Class A CDL.
To obtain a CDL Doubles/Triples endorsement in Maryland, you will need to pass a skills test that demonstrates your ability to safely operate a commercial motor vehicle with doubles/triples. The skills test will include the following maneuvers:
1. Vehicle inspection: You will need to perform a pre-trip inspection of the vehicle to ensure that it is safe to operate.
2. Coupling and uncoupling: You will need to demonstrate your ability to properly couple and uncouple the trailer(s) from the tractor unit.
3. Straight line backing: You will need to back the vehicle in a straight line for a distance of at least 100 feet.
4. 90-degree alley dock: You will need to back the vehicle into a space that is 9 feet wide by 20 feet long, with the rear of the trailer within 3 feet of the dock.
5. Offset backing: You will need to back the vehicle into a space that is offset to the left or right of your starting position.
6. Road test: You will need to demonstrate your ability to safely operate the vehicle on public roads, including making turns, changing lanes, merging onto highways, and navigating intersections.
During the skills test, you will be evaluated on your ability to perform these maneuvers safely and effectively. It is important to practice these maneuvers beforehand and be familiar with the handling characteristics of a commercial motor vehicle with doubles/triples.
1. Vehicle inspection: You will need to perform a pre-trip inspection of the vehicle to ensure that it is safe to operate.
2. Coupling and uncoupling: You will need to demonstrate your ability to properly couple and uncouple the trailer(s) from the tractor unit.
3. Straight line backing: You will need to back the vehicle in a straight line for a distance of at least 100 feet.
4. 90-degree alley dock: You will need to back the vehicle into a space that is 9 feet wide by 20 feet long, with the rear of the trailer within 3 feet of the dock.
5. Offset backing: You will need to back the vehicle into a space that is offset to the left or right of your starting position.
6. Road test: You will need to demonstrate your ability to safely operate the vehicle on public roads, including making turns, changing lanes, merging onto highways, and navigating intersections.
During the skills test, you will be evaluated on your ability to perform these maneuvers safely and effectively. It is important to practice these maneuvers beforehand and be familiar with the handling characteristics of a commercial motor vehicle with doubles/triples.
No, you are not legally allowed to operate double/triple trailers without a CDL Doubles/Triples endorsement in Maryland. The Federal Motor Carrier Safety Administration (FMCSA) requires drivers who wish to operate commercial motor vehicles with double/triple trailers to obtain this endorsement.
To obtain the CDL Doubles/Triples endorsement, you must pass a written test and a skills test that demonstrates your ability to safely operate a commercial motor vehicle with doubles/triples. You must also have at least one year of experience operating a commercial motor vehicle with a Class A CDL before you can take the endorsement tests.
Driving without the proper endorsements can result in fines, license suspension or revocation, and even criminal charges in some cases. It is important to comply with all applicable rules and regulations when operating commercial motor vehicles to ensure safety on the roads and avoid penalties or legal consequences.
To obtain the CDL Doubles/Triples endorsement, you must pass a written test and a skills test that demonstrates your ability to safely operate a commercial motor vehicle with doubles/triples. You must also have at least one year of experience operating a commercial motor vehicle with a Class A CDL before you can take the endorsement tests.
Driving without the proper endorsements can result in fines, license suspension or revocation, and even criminal charges in some cases. It is important to comply with all applicable rules and regulations when operating commercial motor vehicles to ensure safety on the roads and avoid penalties or legal consequences.
If you already have a valid Class A CDL license in Maryland, you can add the CDL Doubles/Triples endorsement to your license by passing the written and skills tests for that endorsement. You do not need to apply for a new license.
To add the CDL Doubles/Triples endorsement to your existing CDL license, you will need to pass the written test and skills test for that endorsement. You can schedule an appointment at a Maryland Motor Vehicle Administration (MVA) office to take the tests.
Once you have passed the tests and paid any necessary fees, your CDL license will be updated to include the Doubles/Triples endorsement. You will receive a new license with the updated information.
It is important to keep your CDL license current and ensure that you have all necessary endorsements for the vehicles you will be operating. Driving without the proper endorsements can result in fines, penalties, and even criminal charges in some cases.
To add the CDL Doubles/Triples endorsement to your existing CDL license, you will need to pass the written test and skills test for that endorsement. You can schedule an appointment at a Maryland Motor Vehicle Administration (MVA) office to take the tests.
Once you have passed the tests and paid any necessary fees, your CDL license will be updated to include the Doubles/Triples endorsement. You will receive a new license with the updated information.
It is important to keep your CDL license current and ensure that you have all necessary endorsements for the vehicles you will be operating. Driving without the proper endorsements can result in fines, penalties, and even criminal charges in some cases.
Yes, there are restrictions and limitations for drivers with a CDL Doubles/Triples endorsement in Maryland. Here are some of the important restrictions to keep in mind:
- Endorsement Required: You must have the CDL Doubles/Triples endorsement on your license to operate commercial motor vehicles with double or triple trailers.
- Combination Length: The maximum overall length of a combination of vehicles with double or triple trailers is 28 feet for each trailer. This means that the total length of the combination cannot exceed 84 feet.
- Weight Limit: The maximum gross vehicle weight (GVW) for a commercial motor vehicle with double or triple trailers is 80,000 pounds.
- Specialized Training: You must have specialized training to operate commercial motor vehicles with double or triple trailers. This training should cover topics such as coupling and uncoupling, turning and backing maneuvers, and safe driving techniques.
It is important to follow all restrictions and limitations when operating commercial motor vehicles with double or triple trailers. Failure to comply with these rules can result in fines, penalties, and even criminal charges in some cases.
- Endorsement Required: You must have the CDL Doubles/Triples endorsement on your license to operate commercial motor vehicles with double or triple trailers.
- Combination Length: The maximum overall length of a combination of vehicles with double or triple trailers is 28 feet for each trailer. This means that the total length of the combination cannot exceed 84 feet.
- Weight Limit: The maximum gross vehicle weight (GVW) for a commercial motor vehicle with double or triple trailers is 80,000 pounds.
- Specialized Training: You must have specialized training to operate commercial motor vehicles with double or triple trailers. This training should cover topics such as coupling and uncoupling, turning and backing maneuvers, and safe driving techniques.
It is important to follow all restrictions and limitations when operating commercial motor vehicles with double or triple trailers. Failure to comply with these rules can result in fines, penalties, and even criminal charges in some cases.
In Maryland, the maximum weight and length limits for double/triple trailers with a CDL Doubles/Triples endorsement are:
1. Gross Vehicle Weight (GVW): The maximum GVW for a commercial motor vehicle with double or triple trailers is 80,000 pounds (36,287 kg).
2. Trailer Length: The maximum trailer length for a double trailer is 28 feet (8.5 meters) for each trailer. The maximum trailer length for a triple trailer is 28 feet (8.5 meters) for each trailer.
3. Overall Length: The overall length limit for a combination of vehicles with double or triple trailers is 68 feet (20.7 meters), which includes the tractor unit.
It is important to note that these weight and length limits may vary depending on the state and federal regulations. It is the responsibility of the driver to be aware of the weight and length limits and to comply with them at all times while operating commercial motor vehicles with double or triple trailers.
1. Gross Vehicle Weight (GVW): The maximum GVW for a commercial motor vehicle with double or triple trailers is 80,000 pounds (36,287 kg).
2. Trailer Length: The maximum trailer length for a double trailer is 28 feet (8.5 meters) for each trailer. The maximum trailer length for a triple trailer is 28 feet (8.5 meters) for each trailer.
3. Overall Length: The overall length limit for a combination of vehicles with double or triple trailers is 68 feet (20.7 meters), which includes the tractor unit.
It is important to note that these weight and length limits may vary depending on the state and federal regulations. It is the responsibility of the driver to be aware of the weight and length limits and to comply with them at all times while operating commercial motor vehicles with double or triple trailers.
Yes, there are specific safety considerations and regulations for driving double/triple trailers with a CDL Doubles/Triples endorsement in Maryland. Here are some of the important safety regulations to keep in mind:
1. Specialized Training: Before driving double/triple trailers, drivers must complete specialized training that covers topics such as coupling and uncoupling, turning and backing maneuvers, and safe driving techniques.
2. Weight Distribution: Proper weight distribution is crucial for safe operation of double/triple trailers. The weight should be evenly distributed between the trailers to prevent overloading and instability.
3. Turning: Double/triple trailers require more space for turning than single trailers. Drivers should be aware of this and plan their turns accordingly to avoid crossing into adjacent lanes or striking curbs or other obstacles.
4. Braking: Double/triple trailers require more distance to come to a stop than single trailers due to their increased weight and length. Drivers should maintain a safe following distance and allow extra time for braking.
5. Coupling and Uncoupling: Proper coupling and uncoupling procedures are essential for safe operation of double/triple trailers. Drivers must ensure that the couplings are secure and that all safety equipment is in place before operating the vehicle.
It is important for drivers with a CDL Doubles/Triples endorsement to follow all safety regulations and best practices to ensure the safe operation of commercial motor vehicles with double/triple trailers. Failure to comply with these regulations can result in fines, penalties, and even criminal charges in some cases.
1. Specialized Training: Before driving double/triple trailers, drivers must complete specialized training that covers topics such as coupling and uncoupling, turning and backing maneuvers, and safe driving techniques.
2. Weight Distribution: Proper weight distribution is crucial for safe operation of double/triple trailers. The weight should be evenly distributed between the trailers to prevent overloading and instability.
3. Turning: Double/triple trailers require more space for turning than single trailers. Drivers should be aware of this and plan their turns accordingly to avoid crossing into adjacent lanes or striking curbs or other obstacles.
4. Braking: Double/triple trailers require more distance to come to a stop than single trailers due to their increased weight and length. Drivers should maintain a safe following distance and allow extra time for braking.
5. Coupling and Uncoupling: Proper coupling and uncoupling procedures are essential for safe operation of double/triple trailers. Drivers must ensure that the couplings are secure and that all safety equipment is in place before operating the vehicle.
It is important for drivers with a CDL Doubles/Triples endorsement to follow all safety regulations and best practices to ensure the safe operation of commercial motor vehicles with double/triple trailers. Failure to comply with these regulations can result in fines, penalties, and even criminal charges in some cases.
